handle strings correctly in ScCondFormatEntry::GetExpression, fdo#58781
handle strings correctly in ScCondFormatEntry::GetExpression, fdo#58781

Change-Id: I418837d4363c14779a4b2a7ce78c8b9e8df7f0d1

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core